/**
 *  Copyright 2002-2009 the original author or authors.
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *       http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
package foo.bar.forum.web.extension;

import net.sourceforge.stripes.action.Resolution;
import net.sourceforge.stripes.controller.ExecutionContext;
import net.sourceforge.stripes.controller.Intercepts;
import net.sourceforge.stripes.controller.LifecycleStage;
import net.sourceforge.stripes.integration.spring.SpringBean;
import net.sourceforge.stripes.integration.spring.SpringInterceptorSupport;
import org.springframework.web.servlet.ThemeResolver;

/**
 * @author tmjee
 * @version $Date$ $Id$
 */
@Intercepts(LifecycleStage.RequestInit)
public class ThemeInterceptor extends SpringInterceptorSupport {

    private ThemeResolver themeResolver;

    @SpringBean("themeResolver")
    public void setThemeResolver(ThemeResolver themeResolver) {
        this.themeResolver=themeResolver;
    }


    public Resolution intercept(ExecutionContext executionContext) throws Exception {
        String paramThemeValue = executionContext.getActionBeanContext().getRequest().getParameter("_theme");
        if (paramThemeValue != null && (paramThemeValue.trim().length() > 0)) {
            themeResolver.setThemeName(
                    executionContext.getActionBeanContext().getRequest(),
                    executionContext.getActionBeanContext().getResponse(),
                    paramThemeValue);
        }
        
        return executionContext.proceed();
    }
}
